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Effects of Dronabinol (Oral THC) on Cannabis Use

This study has been completed.
National Institute on Drug Abuse (NIDA)
Information provided by (Responsible Party):
Ryan Vandrey, Johns Hopkins University Identifier:
First received: July 12, 2011
Last updated: September 11, 2012
Last verified: September 2012
The number of people seeking treatment for marijuana-related problems is on the rise, yet there is no currently accepted medication proven to help them quit. This research is designed to determine whether the FDA approved medication dronabinol (Marinol®) has effects that might help make it easier for people to stop daily marijuana use, and to carefully study the occurence of safety risks and side-effects at different doses of the drug.

Condition Intervention Phase
Marijuana Smoking Drug: Dronabinol Drug: Placebo Phase 1 Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double Blind (Participant, Outcomes Assessor)
Primary Purpose: Basic Science
Official Title: Effects of Dronabinol (Oral THC) on Cannabis Use

Resource links provided by NLM:

Further study details as provided by Ryan Vandrey, Johns Hopkins University:

Primary Outcome Measures:
  • Marijuana self-administration [ Time Frame: up to 39-day hospital stay ]
    Participants will be able to self-administer marijuana under different study conditions. The amount administered across these conditions is the primary study endpoint

Secondary Outcome Measures:
  • Drug effect [ Time Frame: Measured daily during 39-day hospital stay ]
    Participants will complete assessments regarding subjective drug effects multiple times each day.

  • Vitals [ Time Frame: Measured daily during 39-day hospital stay ]
    Participants will have vitals assessed multiple times each day.

Enrollment: 25
Study Start Date: February 2011
Study Completion Date: September 2012
Primary Completion Date: September 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Dronabinol
Participants receive active dronabinol
Drug: Dronabinol
Participants receive dronabinol
Other Names:
  • Marinol
  • THC
Placebo Comparator: Placebo
Participants receive placebo
Drug: Placebo
Participants receive placebo


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Current use of marijuana
  • Able to give informed consent

Exclusion Criteria:

  • Daily use of psychoactive medication
  • Current Axis I psychiatric disorder other than dependence on cannabis or nicotine, or abuse of drugs or alcohol
  • Women who are pregnant, breast feeding, or planning to become pregnant within the next 3 months
  • Those seeking treatment for cannabis-related problems or using cannabis under the guidance of a physician for a medical disorder
  • Uncontrolled or unstable cardiovascular disease
  • Allergy to sesame oil
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01394185

United States, Maryland
Johns Hopkins University (Bayview Campus)
Baltimore, Maryland, United States, 21224
Sponsors and Collaborators
Johns Hopkins University
National Institute on Drug Abuse (NIDA)
Principal Investigator: Ryan Vandrey, Ph.D. Johns Hopkins University
  More Information

Responsible Party: Ryan Vandrey, Assistant Professor, Johns Hopkins University Identifier: NCT01394185     History of Changes
Other Study ID Numbers: NA_00041251
R01DA025044 ( U.S. NIH Grant/Contract )
Study First Received: July 12, 2011
Last Updated: September 11, 2012

Keywords provided by Ryan Vandrey, Johns Hopkins University:

Additional relevant MeSH terms:
Marijuana Abuse
Substance-Related Disorders
Chemically-Induced Disorders
Mental Disorders
Physiological Effects of Drugs
Psychotropic Drugs
Analgesics, Non-Narcotic
Sensory System Agents
Peripheral Nervous System Agents
Cannabinoid Receptor Agonists
Cannabinoid Receptor Modulators
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Hormones, Hormone Substitutes, and Hormone Antagonists processed this record on July 24, 2017